UFC World Tour comes to Los Angeles, but what will Ronda Rousey say?

Spend several weeks coaching men and women on Season 18 of "The Ultimate Fighter" against bitter rival Miesha Tate. Then go out and promote the UFC reality series.

And of course, everything you just experienced during filming is top secret. Good luck, champ.

And that is how it will be Tuesday when Rousey joins three other champions and four title challengers as the UFC World Tour touches down Tuesday at Club Nokia at L.A. Live.

The event, which starts at 11 a.m., is free and open to the public and will be hosted by UFC president Dana White, is part of the UFC's efforts to promote its four pay-per-view championship fights in the final four months of 2013. In a span of six days, the whirlwind tour will visit 11 cities in five countries.

But unlike heavyweight champion Cain Velasquez, light heavyweight champion Jon Jones and welterweight champion Georges St-Pierre, Rousey will be on her home turf Tuesday and have to be uncharacteristically tight-lipped.

"They say, 'Don't say anything about it or you'll be in big, big trouble,' " Rousey said from the road Sunday after she attended "UFC on Fox 8" in Seattle.

All that's known about "TUF 18" is that it's the first time women are coaching and the finales will feature 135-pound men and women.

Other than that, not much has changed. Rousey can't stand Tate, whom she defeated via armbar for the Strikeforce title in March 2012, and Tate feels the same.

Which should equal ratings gold for Fox Sports 1, the new sports network that debuts Aug. 17. 'TUF 18,' which wrapped filming a few weeks ago, will makes its splash Sept. 4.

"Yeah, there was all this crazy stuff and I have to be real particular about what I say," Rousey said, "which is probably the reason why I didn't like 'TUF' because I have to be so careful about what I said all the time. That made me crazy."

Joining Rousey on Tuesday will be Jones and light heavyweight challenger Alexander Gustafsson. Jones, the 205-pound champion who is regarded as the greatest pound-for-pound fighter in the UFC, will defend his belt against the Swedish prospect at UFC 165 on Sept. 21 at the Air Canada Centre in Toronto.

No strangers to Southern California, Velasquez and heavyweight challenger Junior dos Santos will also be in Los Angeles to promote their third title showdown as the main event at UFC 166 on Oct. 19 at the Toyota Center in Houston. Dos Santos first won the belt with a first-round knockout of Velasquez at UFC on Fox 1 in November 2011 at the Honda Center in Anaheim. Velasquez gained revenge and secured the gold with a dominating five-round decision over the Brazilian at UFC 155 in December.

Rounding out the world tour roster are St-Pierre, the longest-reigning champion in the UFC, and welterweight challenger Johny Hendricks. St-Pierre, who hasn't lost since 2007, will make the ninth defense of his belt when he faces the heavy-handed Hendricks at UFC 167 on Nov. 16 at the MGM Grand Garden Arena in Las Vegas.

And then there's Rousey and Tate, who after the dust settles with the culmination of 'The Ultimate Fighter,' will square off at UFC 168 on Dec. 28 at the MGM Grand Garden Arena. They are now sharing top billing with another highly anticipated rematch: new middleweight champion Chris Weidman vs. recently dethroned Anderson Silva.

The fight against Tate might be five months away, but at least there's a light at the end of the tunnel in regards to "The Ultimate Fighter" gag order.

"I would just say it was taxing, a taxing experience," Rousey said. "Every step of the way. We'll just leave it like that."